根据光线通过均匀透明平行平板介质时发生的横向位移特性，提出了一种利用线阵CCD和计算机自动测量此横向位移量，并很快计算出透明介质折射率的简单方法。采用He-Ne激光以入射角分别为30°、45°、60°和75°对K9玻璃的折射率进行了测量，测量中用曲线拟合法确定光斑的中心位置来获得偏移量，最终测量精度能够达到10-3量级。对实验方法误差进行了分析，提出了减小测量误差、提高测量精度的措施。

According to the characteristic of transverse displacement which is produced when the light beams pass through uniform and transparent medium such as a parallel plate, a simple method was put forward for calculating the refractive index of transparent medium based on measuring the transverse displacement automatically with linear CCD and computer. Measurements on the refractive index of K9 glass were made using He-Ne laser beam with the incident angle of 30°,45°,60°,75°, respectively. For the measurements, the center of light spot is determined by the curve fitting method to acquire the transverse displacement and the final measurement precision is up to 10-3. Then the error of this method is analyzed and some improvement measures are proposed.